<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-button type="primary" @click="showAddRoleDialog">添加角色</el-button>

      <!-- 表格区域 -->
      <el-table :data="rolesList" style="width: 100%" border stripe>
        <!-- 扩展区域 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['vcenter', 'bdbottom', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环，渲染所有二级权限 -->
                <el-row
                  :class="['vcenter', i2 === 0 ? '' : 'bdtop']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      type="success"
                    >
                      {{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 显示区域 -->
        <el-table-column type="index" width="50"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <!-- 操作按钮 -->
        <el-table-column label="操作" width="290px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditRolesDialog(scope.row)"
              >编辑</el-button
            >

            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="deleteRole(scope.row.id)"
              >删除</el-button
            >

            <!-- 分配权限按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 内容主体 树形空间 -->
      <el-tree
        :data="rightslists"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <!-- 内容底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRolesDialogVisible"
      width="50%"
      @close="addRoleDialogClosed"
    >
      <!-- 表单区域 -->
      <el-form
        :model="addRoleForm"
        :rules="addRoleRules"
        ref="addRoleRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRoleDialogVisible"
      width="50%"
    >
      <!-- 内容主体 -->
      <span>这是一段信息</span>
      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleDialogVisible = false"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色列表
      rolesList: [],

      //控制对话框的显示与隐藏
      setRightDialogVisible: false, //分配权限
      addRolesDialogVisible: false, //添加角色
      editRoleDialogVisible: false,

      //权限数据
      rightslists: [],
      //树形控件的属性绑定事件
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的节点id
      defKeys: [],

      //当前即将分配权限的角色id
      roleId: "",

      //添加角色
      addRoleForm: {
        roleName: "",
        roleDesc: "",
      },
      addRoleRules: {
        roleName: [
          { required: true, message: "请输入角色名称！", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取用户角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      //console.log(res);
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolesList = res.data;
      //console.log(res.data);
    },

    //根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除角色权限失败！");
      }
      this.$message.success("删除角色权限成功！");
      //this.getRolesList()
      role.children = res.data;
    },

    //展示分配权限的对话框
    async showSetRightDialog(role) {
      //获取id
      this.roleId = role.id;
      //获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败！");
      }
      // 把获取到的权限数据保存到data中
      this.rightslists = res.data;

      //递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);

      this.setRightDialogVisible = true;
    },

    //通过递归的形式，获取角色下的所有三级权限的id,并保存到defKeys中
    getLeafKeys(node, arr) {
      //如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },

    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },

    //点击确定为角色分配权限的函数
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      // ... 为展开运算符，获取到已选权限的id

      //将id 以逗号拼接
      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配角色权限失败！");
      }
      this.$message.success("分配角色权限成功！");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },

    //添加角色按钮触发事件，展示添加角色对话框
    showAddRoleDialog() {
      this.addRolesDialogVisible = true;
    },

    //添加角色对话框关闭事件
    addRoleDialogClosed() {
      this.$refs.addRoleRef.resetFields();
    },

    //添加角色
    addRoles() {
      this.$refs.addRoleRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post("roles", this.addRoleForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败！");
        }
        this.addRolesDialogVisible = false;
        this.$message.success("添加角色成功！");
        this.getRolesList();
      });
    },

    //删除角色
    async deleteRole(deleteRoleID) {
      //console.log(deleteRoleID);
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      // console.log(confirmResult);
      if (confirmResult === "cancel") {
        return this.$message({
          type: "info",
          message: "已取消删除",
        });
      } else if (confirmResult === "confirm") {
        const { data: res } = await this.$http.delete(`roles/${deleteRoleID}`);
        if (res.meta.status !== 200) {
          return this.$message.error("删除角色失败！");
        }
        this.$message({
          type: "success",
          message: "删除角色成功!",
        });
        this.getRolesList();
      }
    },

    //编辑角色
    showEditRolesDialog(editRole) {
      this.editRoleDialogVisible = true;
    },
  },
};
</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #ccc;
}
.bdbottom {
  border-bottom: 1px solid #ccc;
}

/* 纵向居中 */
.vcenter {
  display: flex;
  align-items: center;
}
</style>